# SDR AU960238

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 4, 1996
- Submitted: March 26, 2000
- Operation: General aviation
- Make and model: Hiller UH-12E
- Registry model: [Hiller UH-12E](https://openairdocs.org/model/hiller-uh-12e) (OpenAirDocs)
- System (JASC): [6310 · Engine/Transmission Coupling](https://openairdocs.org/jasc/6310)
- Part: Locknut
- Part number: 23623
- Condition: Loose
- Location: Eng/Trans Cplng
- Component: Hiller, TRANSMISSION
- Stage of operation: DE
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AU960238

## Discrepancy

(AUS) TRANSMISSION CLUTCH BEARING RETENTION NUT LOCKWIRE BROKEN  ALLOWING THE OUTER CLUTCH HOUSING TO BIND AGAINST THE FIRST STAGECARRIER - SUSPECT CAUSED BY INSUFFICIENT TORQUE ON NUT DURING  LAST TRANSMISION OVERHAUL, NUT AND/OR BEARINGS NOT CORRECTLY SEATED DURING ASSEMBLY AT OVERHAUL OR LOCKWIRE PICKING UP ON SLEEVE AND BREAKING ALLOWING NUT TO LOOSEN DURING FREQUENT AUTOROTATIONS - TRANSMISSION FREEWHEEL LOCKUP - METAL  CONTAMINATION OF TRANSMISSION OIL FILTER

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